Unit 1, Day 4: Would You Tell a Stranger?

Lesson 4 of 6 in Unit 1, Use It, Check It, Own It

School-year day

Day 4 of 180

Time

20-minute core + 30-minute extension (50 minutes in all)

Teacher Talk with MystrS. Checked October 25, 2026 (Pacific time). Tags: Cyber, AI.

Existing lesson: /teach-it-this-week/would-you-tell-a-stranger/

Goal: Students will be able to:

• Apply the postcard rule: if you would not write it on a postcard, do not type it into a chatbot.
• Sort details into three groups: fine to share, change the details first, never share.
• Find where a chatbot keeps its data and history settings.

Materials:

• Projector
• Sorting cards with sample details: a first name, a home address, a grade, a password, a medical detail, a school name, a photo
• A screenshot of one chatbot's data controls page (the existing lesson links OpenAI's and Google's)

Core (20 min)

1. Hold up a postcard. Ask who can read it on its way to the mailbox. (3 min)
2. Groups sort the cards into three piles: fine, change details, never. (10 min)
3. Go over the cards the groups disagreed on. (4 min)
4. Check for understanding. (3 min)

Extension (up to 30 min)

• Groups take one "change details" card and rewrite a prompt so it still gets help without the private part. (15 min)
• Screenshot tour of where chat history and training settings live. No student accounts are needed. (15 min)

Check for understanding: "Rewrite this prompt so it is safe to send: 'My name is Jordan Lee, I go to Lincoln Middle, and I'm failing math. Help me.'"

Standards (from our standards map):

• NICE: NF-COM-002
• CSTA 2017: 3A-IC-29; 2-IC-23
• CSTA 2026: MS-DAT-IM-28
• NSPFE: Managing Risk 12-11b

Talk about it at home